The BigQuery dataset is entirely 3rd party, based on the public HN data (presumably via the HN Firebase API - https://github.com/HackerNews/API), so anyone is free to do this.

Yes, that’s how it works. Same data as in the API.

a bit off topic: is there a way to display a HN page using the firebase API/sdk without doing N+1 requests ?

(sorry for noob question)

No, unfortunately. We're going to make a new API that will be much easier, but there's at least one other major project that needs to get done first.

Thanks for the response!